Determination of |Vub| from Measurements of the Electron and Neutrino Momenta in Inclusive Semileptonic B Decays

Preprint

20 June 2006

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0506036

Abstract

We present a determination of the CKM matrix element |Vub| based on the analysis of semileptonic B decays from a sample of 88 million Upsilon(4S) decays collected with the BABAR detector at the PEP-II e+e- storage ring. Charmless semileptonic B decays are selected using measurements of the electron energy and the invariant mass squared of the electron-neutrino pair. We obtain |Vub| = (3.95 +/- 0.26 ^{+0.58}_{-0.42} +/- 0.25) x 10^{-3}, where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively.

Keywords

INCLUSIVE SEMILEPTONIC
ELECTRON NEUTRINO
NEUTRINO MOMENTA
UNCERTAINTIES
SEMILEPTONIC
DECAYS
VUB

All Related Versions

Version 1, 2005-06-14, ArXiv
Version 2, 2005-09-09, ArXiv
Version 3, 2006-06-20, ArXiv
Published version: Physical Review Letters, 95 (11), 111801.

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